Master of Puppets is the third studio album by the American heavy metal band Metallica, released on March 3, 1986, by Elektra Records. Recorded in Copenhagen, Denmark, at Sweet Silence Studios with producer Flemming Rasmussen, it is the band's final album to feature bassist Cliff Burton. While touring in support of Master of Puppets, he died on September 27, 1986, after the band's tour bus was involved in an accident in Dörarp, Sweden.